Which of these can be correctly said to be a strong electrolyte ?

Options

A. Urea
B. `NH_(4)OH`
C. Sugar
D. Sodium acetate

Answer

To determine which of the given substances can be correctly classified as a strong electrolyte, we need to understand the definition of a strong electrolyte. A strong electrolyte is a substance that completely dissociates into ions when dissolved in water or another solvent.

### Step-by-step Solution:

1. **Understanding Strong Electrolytes**:
- A strong electrolyte is a substance that completely ionizes in solution, producing a large number of ions that can conduct electricity.

2. **Analyzing Urea (NH2C(=O)NH2)**:
- Urea does not dissociate into ions when dissolved in water. It remains as neutral molecules.
- **Conclusion**: Urea is not a strong electrolyte.

3. **Analyzing Ammonium Hydroxide (NH4OH)**:
- Ammonium hydroxide dissociates into NH4⁺ and OH⁻ ions but does so only partially.
- It is classified as a weak base and therefore a weak electrolyte.
- **Conclusion**: Ammonium hydroxide is not a strong electrolyte.

4. **Analyzing Sugar (C12H22O11)**:
- Sugar dissolves in water but does not dissociate into ions; it remains as whole molecules.
- Since it does not produce ions, it cannot conduct electricity effectively.
- **Conclusion**: Sugar is not a strong electrolyte.

5. **Analyzing Sodium Acetate (CH3COONa)**:
- Sodium acetate is a salt formed from a strong base (NaOH) and a weak acid (acetic acid, CH3COOH).
- When dissolved in water, sodium acetate completely dissociates into Na⁺ and CH3COO⁻ ions.
- **Conclusion**: Sodium acetate is a strong electrolyte.

### Final Answer:
Out of the given options, **sodium acetate (CH3COONa)** can be correctly classified as a strong electrolyte.

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